Question

Найдите неизвестное число: 8/7•х=2/7

Answer 1

х=2/7÷8/7
х=2/7×7/8
х=1/4
$$$$$$$$$$$$$$/

Answer 2

$\frac{8}{7} * x= \frac{2}{7}$
$x= \frac{8}{7} : \frac{2}{7}$
$x= \frac{8}{7} * \frac{7}{2}$
$x=4$